US 12,463,484 B2
Stator, motor, fan device, and coil winding method
Shingo Watanabe, Gunma (JP); Keiichi Hosoi, Gunma (JP); and Satoshi Itabashi, Gunma (JP)
Assigned to MITSUBA Corporation, Gunma (JP)
Filed by MITSUBA Corporation, Gunma (JP)
Filed on Jun. 20, 2023, as Appl. No. 18/337,450.
Claims priority of application No. 2022-145323 (JP), filed on Sep. 13, 2022.
Prior Publication US 2024/0088734 A1, Mar. 14, 2024
Int. Cl. H02K 3/28 (2006.01); H02K 1/16 (2006.01); H02K 15/026 (2025.01); H02K 15/085 (2006.01)
CPC H02K 3/28 (2013.01) [H02K 1/16 (2013.01); H02K 15/026 (2013.01); H02K 15/085 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A stator, comprising: 12 teeth, spaced apart in a circumferential direction and forming a ring shape; a cylindrical part, protruding from an inner periphery or an outer periphery of the 12 teeth toward two sides in an axial direction; and coils respectively wound around the 12 teeth,
wherein the coils comprise:
an A-phase coil, wound around four of the 12 teeth and supplied with an A-phase current;
a B-phase coil, wound around another four of the 12 teeth and supplied with a B-phase current;
a C-phase coil, wound around yet another four of the 12 teeth and supplied with a C-phase current,
wherein the A-phase coil comprises a transition part provided to extend along the cylindrical part on a side in the axial direction between the teeth spaced apart in the circumferential direction,
the B-phase coil and the C-phase coil each comprise a transition part provided to extend along the cylindrical part on an other side in the axial direction between the teeth spaced apart in the circumferential direction, and
a total number of turns of the A-phase coil is two turns fewer than a total number of turns of the B-phase coil and a total number of turns of the C-phase coil.